Cisco Cisco Email Security Appliance C160 Guía Del Usuario
Chapter 5 Using Message Filters to Enforce Email Policies
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Cisco IronPort AsyncOS 7.1 for Email Advanced Configuration Guide
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Image Analysis
Some messages contain images that you may wish to scan for inappropriate
content. You can use the image analysis engine to search for inappropriate content
in email. Image analysis is not designed to supplement or replace your anti-virus
and anti-spam scanning engines. Its purpose is to enforce acceptable use by
identifying inappropriate content in email. Use the image analysis scanning
engine to quarantine and analyze mail and to detect trends.
content. You can use the image analysis engine to search for inappropriate content
in email. Image analysis is not designed to supplement or replace your anti-virus
and anti-spam scanning engines. Its purpose is to enforce acceptable use by
identifying inappropriate content in email. Use the image analysis scanning
engine to quarantine and analyze mail and to detect trends.
Drop
Attachments
by Size
Attachments
by Size
drop-attachments-by-siz
e (<number>[, <optional
comment>])
Drops all attachments on the
message that, in raw encoded form,
are equal to or greater than the size
(in bytes) given. Note that for
archive or compressed files, this
action does not examine the
uncompressed size, but rather the
size of the actual attachment itself.
message that, in raw encoded form,
are equal to or greater than the size
(in bytes) given. Note that for
archive or compressed files, this
action does not examine the
uncompressed size, but rather the
size of the actual attachment itself.
Attachment
Scanning
Scanning
drop-attachments-where-
contains (<regular
expression>[, <optional
comment>])
Drops all attachments on message
that contain the regular expression.
Archive files (zip, tar) will be
dropped if any of the files they
contain match the regular expression
pattern.
that contain the regular expression.
Archive files (zip, tar) will be
dropped if any of the files they
contain match the regular expression
pattern.
Drop
Attachments
by Dictionary
Matches
Attachments
by Dictionary
Matches
drop-attachments-where-
dictionary-match(<dicti
onary name>)
This filter action strips attachments
based on matches to dictionary
terms. If the terms in the MIME parts
considered to be an attachment
match a dictionary term (and the
user-defined threshold is met), the
attachment is stripped from the
email. See
based on matches to dictionary
terms. If the terms in the MIME parts
considered to be an attachment
match a dictionary term (and the
user-defined threshold is met), the
attachment is stripped from the
email. See
Table 5-8
Message Filter Actions for Attachment Filtering (Continued)
Action
Syntax Description